# Interpolator vs Nautical Calculator.

The clearest difference is in-app purchases: Interpolator at none against Nautical Calculator.'s 1. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Nautical Calculator. sells 1 one-off in-app purchase. Interpolator asks for nothing beyond the download.

Interpolator ships an update every 4 months, Nautical Calculator. every 6 months. The most recent releases landed on October 12, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Interpolator | Nautical Calculator. |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (74 ratings)](https://appshunter.io/ios/app/interpolator/id635235982/reviews)** | — |
| Number of ratings | **74** | — |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 6 months |
| Monetization | Free | — |
| Size | 18 MB | 42 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | +4 | 4+ |
| Developer | [ron mooring](https://appshunter.io/developer/612283157) | [Nanjibhai Gorasiya](https://appshunter.io/developer/1834066312) |

## What reviewers say

### Interpolator

[App page](https://appshunter.io/ios/app/interpolator/id635235982)

Easily find values within tables using interpolation for two or three rows. This utility app simplifies calculations without needing a separate calculator, making it ideal for various table-based environments.

**Highlights:** Two-row interpolation, Three-row interpolation, Table value lookup, No calculator needed, Cargo surveyor tool, General table use

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Nautical Calculator.

[App page](https://appshunter.io/ios/app/nautical-calculator/id6755711720)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime premium | $12.99 | one-time |


## Frequently asked questions

### Is Interpolator free?

Interpolator is free to download, with no in-app purchases.

### Is Nautical Calculator. free?

Nautical Calculator. is free to download, with in-app purchases available.

### Do Interpolator or Nautical Calculator. have ads?

Neither Interpolator nor Nautical Calculator. shows ads.

### Which is updated more often, Interpolator or Nautical Calculator.?

Interpolator ships an update every 4 months, and Nautical Calculator. every 6 months. Most recently, Interpolator was updated on October 12, 2026 and Nautical Calculator. on October 13, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*